Studies on the Redox Properties of Heteropolymolybdates with Transition Metals

Abstract

Abstract: The redox properties of heteropolymolybdates with transition metals,Na₅[PM(H₂O) Mo₁₁O₃₉]·nH₂O(M=Mn²⁺,Co²⁺,Ni²⁺,Cu²⁺,Zn²⁺),in water-dioxane solutions were studied by using electrochemical method.We found the variation of the coordination circumstance would influence the half-wave potential (E_1/2) of the heteropoly anions,and the extent of the influence depends on the properties of the inserted transition metals ions.The order of the polaro-graphic half-wave potential of the heteropolyanious substituted by transition metal ions is as follows,Ni²⁺>Co²⁺>Zn²⁺>Cu²⁺>Mn²⁺.The effect of Cu²⁺ ion on the redox properties of the heteropoly anions is discussed in detail.

Key words: Heteropoly compounds, Redox, Cyclic voltammetry

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QIN Du-Jie, LI Jing, WANG Guo-Jia, WU Yue . Studies on the Redox Properties of Heteropolymolybdates with Transition Metals[J]. Chem. J. Chinese Universities, 1992, 13(8): 1118.

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Studies on the Redox Properties of Heteropolymolybdates with Transition Metals

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